diff options
| author | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
|---|---|---|
| committer | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
| commit | 1a78a62555be32868418fe52f8e330c9d0f95d5a (patch) | |
| tree | d3765a80e7d3b9640ec2e930743630cd6b9fce2b /doc/html/chrono/appendices.html | |
| download | boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.gz boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.bz2 boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.zip | |
Imported Upstream version 1.49.0upstream/1.49.0
Diffstat (limited to 'doc/html/chrono/appendices.html')
| -rwxr-xr-x | doc/html/chrono/appendices.html | 707 |
1 files changed, 707 insertions, 0 deletions
diff --git a/doc/html/chrono/appendices.html b/doc/html/chrono/appendices.html new file mode 100755 index 0000000000..47314e5445 --- /dev/null +++ b/doc/html/chrono/appendices.html @@ -0,0 +1,707 @@ +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> +<title>Appendices</title> +<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> +<meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> +<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> +<link rel="up" href="../chrono.html" title="Chapter 4. Boost.Chrono 1.2.1"> +<link rel="prev" href="reference.html" title="Reference"> +<link rel="next" href="../id319082-bb.html" title="Chapter 5. Boost.Concept_Check"> +</head> +<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> +<table cellpadding="2" width="100%"><tr> +<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> +<td align="center"><a href="../../../index.html">Home</a></td> +<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> +<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> +<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> +<td align="center"><a href="../../../more/index.htm">More</a></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="reference.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../chrono.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../id319082-bb.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="section"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="chrono.appendices"></a><a class="link" href="appendices.html" title="Appendices">Appendices</a> +</h2></div></div></div> +<div class="toc"><dl> +<dt><span class="section"><a href="appendices.html#chrono.appendices.history">Appendix: History</a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.rationale">Appendix: Rationale</a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.implementation">Appendix: Implementation + Notes</a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.faq">Appendix: FAQ</a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.acknowledgements">Appendix: Acknowledgements</a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.todo">Appendix: Future plans</a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.history"></a><a class="link" href="appendices.html#chrono.appendices.history" title="Appendix: History">Appendix: History</a> +</h3></div></div></div> +<div class="toc"><dl> +<dt><span class="section"><a href="appendices.html#chrono.appendices.history.__version_1_2_1__february_1__2012___1_49__"><span class="bold"><strong>Version 1.2.1, February 1, 2012 - 1.49</strong></span> </a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.history.__version_1_2_0__october_17__2011___1_48___"><span class="bold"><strong>Version 1.2.0, October 17, 2011 - 1.48 </strong></span> </a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.history.__version_1_1_0__mars_17__2011___1_47__"><span class="bold"><strong>Version 1.1.0, Mars 17, 2011 - 1.47</strong></span> </a></span></dt> +<dt><span class="section"><a href="appendices.html#chrono.appendices.history.__version_1_0_0__january_6__2011__"><span class="bold"><strong>Version 1.0.0, January 6, 2011</strong></span> </a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="chrono.appendices.history.__version_1_2_1__february_1__2012___1_49__"></a><a class="link" href="appendices.html#chrono.appendices.history.__version_1_2_1__february_1__2012___1_49__" title="Version 1.2.1, February 1, 2012 - 1.49"><span class="bold"><strong>Version 1.2.1, February 1, 2012 - 1.49</strong></span> </a> +</h4></div></div></div> +<p> + <span class="bold"><strong>Fixes:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/6092" target="_top">#6092</a> + Input from non integral durations makes the compiler fail. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/6093" target="_top">#6093</a> + [1/3]second fails as valid duration input. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/6113" target="_top">#6113</a> + duplicate symbol when BOOST_CHRONO_HEADER_ONLY is defined. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/6243" target="_top">#6243</a> + Sandia-pgi-11.9: more than one instance of overloaded function "min" + matches. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/6257" target="_top">#6257</a> + process_cpu_clock::now() on linux gives time_points 1/1000 times. + </li> +</ul></div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="chrono.appendices.history.__version_1_2_0__october_17__2011___1_48___"></a><a class="link" href="appendices.html#chrono.appendices.history.__version_1_2_0__october_17__2011___1_48___" title="Version 1.2.0, October 17, 2011 - 1.48"><span class="bold"><strong>Version 1.2.0, October 17, 2011 - 1.48 </strong></span> </a> +</h4></div></div></div> +<p> + <span class="bold"><strong>New Features:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5979" target="_top">#5979</a> + Added chrono rounding utilities as defined By Howard Hinnant <a href="http://home.roadrunner.com/~hinnant/duration_io/chrono_util.html" target="_top">here</a>. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5978" target="_top">#5978</a> + Add BOOST_CHRONO_HAS_PROCESS_CLOCKS to know if process clocks are available. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5998" target="_top">#5998</a> + Make possible to don't provide hybrid error handling. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5906" target="_top">#5906</a> + Take in account the constexpr as defined in the standard. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5907" target="_top">#5907</a> + Take in account noexcept for compilers supporting it. + </li> +</ul></div> +<p> + <span class="bold"><strong>Fixes:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5669" target="_top">#5669</a> + Intel compiler failure to compile duration.hpp + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/2114" target="_top">#2114</a> + Enable visibility support (Boost.Chrono part) + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5909" target="_top">#5909</a> + process_cpu_clock::now() on MAC gives time_points 1/1000 times. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5946" target="_top">#5946</a> + Process real cpu clock returns the system steady clock (windows). + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5974" target="_top">#5974</a> + Process real cpu clock should use clock() instead of times() in MAC + which is twice faster and have better resolution. + </li> +</ul></div> +<p> + <span class="bold"><strong>Cleanup:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5975" target="_top">#5975</a> + Reduce the combinations of header-only, shared, static link to reduce + test time by 50%. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5976" target="_top">#5976</a> + chrono_accuracy_test is not deterministic and should be removed from + the regression tests + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5977" target="_top">#5977</a> + Remove old files from Beman's version. Some old files included in the + Beman's version and not documented in the reviewed version that have + been definitely removed from the repository as + <div class="itemizedlist"><ul class="itemizedlist" type="circle"> +<li class="listitem"> + boost/chrono/timer.hpp, + </li> +<li class="listitem"> + boost/chrono/process_times.hpp + </li> +<li class="listitem"> + boost/chrono/detail/process_clock.hpp, + </li> +<li class="listitem"> + boost/chrono/detail/mac/process_clock.hpp, + </li> +<li class="listitem"> + boost/chrono/detail/posix/process_clock.hpp, + </li> +<li class="listitem"> + boost/chrono/detail/win/process_clock.hpp, + </li> +<li class="listitem"> + boost/chrono/detail/run_timer.hpp, + </li> +<li class="listitem"> + boost/chrono/detail/run_timer_static.hpp, + </li> +</ul></div> + </li> +</ul></div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="chrono.appendices.history.__version_1_1_0__mars_17__2011___1_47__"></a><a class="link" href="appendices.html#chrono.appendices.history.__version_1_1_0__mars_17__2011___1_47__" title="Version 1.1.0, Mars 17, 2011 - 1.47"><span class="bold"><strong>Version 1.1.0, Mars 17, 2011 - 1.47</strong></span> </a> +</h4></div></div></div> +<p> + <span class="bold"><strong>New Features:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/????" target="_top">#????</a> + Added time_point unary operators +,-,++,-- and binary operators +<code class="literal">,-</code> + with Rep al RHS. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5323" target="_top">#5323</a> + Add Associated type difference_type for chrono::time_point. + </li> +</ul></div> +<p> + <span class="bold"><strong>Fixes:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5322" target="_top">#5322</a> + Explicit default constructed chrono::durations are uninitialized + </li></ul></div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="chrono.appendices.history.__version_1_0_0__january_6__2011__"></a><a class="link" href="appendices.html#chrono.appendices.history.__version_1_0_0__january_6__2011__" title="Version 1.0.0, January 6, 2011"><span class="bold"><strong>Version 1.0.0, January 6, 2011</strong></span> </a> +</h4></div></div></div> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Moved chrono to trunk taking in account the review remarks. + </li> +<li class="listitem"> + Documentation revision. + </li> +</ul></div> +<p> + <span class="bold"><strong>Features:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Boost_Chrono is now a configurable header-only library version (that + also allows the user to choose if the <code class="computeroutput"><span class="identifier">windows</span><span class="special">.</span><span class="identifier">h</span></code> + file is included or not). + </li> +<li class="listitem"> + Added clock_string<> traits. + </li> +<li class="listitem"> + Define chrono-io for all the clocks. + </li> +<li class="listitem"> + Add input of process_times representation. + </li> +</ul></div> +<p> + <span class="bold"><strong>Implementation:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Use of detail/win files to avoid the use of windows.h file. + </li> +<li class="listitem"> + Completed the error_code handling. + </li> +<li class="listitem"> + Works now with BOOST_SYSTEM_NO_DEPRECATED. + </li> +</ul></div> +<p> + <span class="bold"><strong>Fixes:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Fix some warnings. + </li> +<li class="listitem"> + Fix original errors on Mac + </li> +<li class="listitem"> + Don't fix the link with boost_system to static. + </li> +</ul></div> +<p> + <span class="bold"><strong>Test:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Added test on process and thread clocks. + </li> +<li class="listitem"> + Moved to lightweight_test.hpp. + </li> +<li class="listitem"> + Able to test multiple configurations. + </li> +</ul></div> +<p> + <span class="bold"><strong>Doc:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"> + Removed some not useful parts as the test and the tickets. + </li></ul></div> +</div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.rationale"></a><a class="link" href="appendices.html#chrono.appendices.rationale" title="Appendix: Rationale">Appendix: Rationale</a> +</h3></div></div></div> +<p> + See <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2661.htm" target="_top"><span class="bold"><strong>N2661 - A Foundation to Sleep On</strong></span></a> which is + very informative and provides motivation for key design decisions. This section + contains some extracts from this document. + </p> +<h5> +<a name="chrono.appendices.rationale.h0"></a> + <span><a name="chrono.appendices.rationale.why_duration_needs_operator_"></a></span><a class="link" href="appendices.html#chrono.appendices.rationale.why_duration_needs_operator_">Why duration + needs operator%</a> + </h5> +<p> + This operator is convenient for computing where in a time frame a given duration + lies. A motivating example is converting a duration into a "broken-down" + time duration such as hours::minutes::seconds: + </p> +<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">ClockTime</span> +<span class="special">{</span> + <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">hours</span> <span class="identifier">hours</span><span class="special">;</span> + <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">minutes</span> <span class="identifier">minutes</span><span class="special">;</span> + <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">seconds</span> <span class="identifier">seconds</span><span class="special">;</span> +<span class="keyword">public</span><span class="special">:</span> + <span class="identifier">hours</span> <span class="identifier">hours_</span><span class="special">;</span> + <span class="identifier">minutes</span> <span class="identifier">minutes_</span><span class="special">;</span> + <span class="identifier">seconds</span> <span class="identifier">seconds_</span><span class="special">;</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Rep</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Period</span><span class="special">></span> + <span class="keyword">explicit</span> <span class="identifier">ClockTime</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration</span><span class="special"><</span><span class="identifier">Rep</span><span class="special">,</span> <span class="identifier">Period</span><span class="special">>&</span> <span class="identifier">d</span><span class="special">)</span> + <span class="special">:</span> <span class="identifier">hours_</span> <span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration_cast</span><span class="special"><</span><span class="identifier">hours</span><span class="special">></span> <span class="special">(</span><span class="identifier">d</span><span class="special">)),</span> + <span class="identifier">minutes_</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration_cast</span><span class="special"><</span><span class="identifier">minutes</span><span class="special">>(</span><span class="identifier">d</span> <span class="special">%</span> <span class="identifier">hours</span><span class="special">(</span><span class="number">1</span><span class="special">))),</span> + <span class="identifier">seconds_</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration_cast</span><span class="special"><</span><span class="identifier">seconds</span><span class="special">>(</span><span class="identifier">d</span> <span class="special">%</span> <span class="identifier">minutes</span><span class="special">(</span><span class="number">1</span><span class="special">)))</span> + <span class="special">{}</span> +<span class="special">};</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.implementation"></a><a class="link" href="appendices.html#chrono.appendices.implementation" title="Appendix: Implementation Notes">Appendix: Implementation + Notes</a> +</h3></div></div></div> +<h5> +<a name="chrono.appendices.implementation.h0"></a> + <span><a name="chrono.appendices.implementation.which_apis_have_been_chosen_to_implement_each_clock_on_each_platform_"></a></span><a class="link" href="appendices.html#chrono.appendices.implementation.which_apis_have_been_chosen_to_implement_each_clock_on_each_platform_">Which + APIs have been chosen to implement each clock on each platform?</a> + </h5> +<p> + The following table presents a resume of which API is uused for each clock + on each platform + </p> +<div class="table"> +<a name="chrono.appendices.implementation.clock_api_correspondence"></a><p class="title"><b>Table 4.3. Clock API correspondence</b></p> +<div class="table-contents"><table class="table" summary="Clock API correspondence"> +<colgroup> +<col> +<col> +<col> +<col> +</colgroup> +<thead><tr> +<th> + <p> + Clock + </p> + </th> +<th> + <p> + Windows Platform + </p> + </th> +<th> + <p> + Posix Platform + </p> + </th> +<th> + <p> + Mac Platform + </p> + </th> +</tr></thead> +<tbody> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.cpp0x.system_clocks_hpp.system_clock" title="Class system_clock"><code class="computeroutput"><span class="identifier">system_clock</span></code></a> + </p> + </td> +<td> + <p> + GetSystemTimeAsFileTime + </p> + </td> +<td> + <p> + clock_gettime( CLOCK_REALTIME) + </p> + </td> +<td> + <p> + gettimeofday + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.cpp0x.system_clocks_hpp.steady_clock" title="Class steady_clock"><code class="computeroutput"><span class="identifier">steady_clock</span></code></a> + </p> + </td> +<td> + <p> + QueryPerformanceCounter and QueryPerformanceFrequency + </p> + </td> +<td> + <p> + clock_gettime( CLOCK_STEADY) + </p> + </td> +<td> + <p> + mach_timebase_info,mach_absolute_time + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.other_clocks.process_cpu_clocks_hpp.process_real_cpu_clock" title="Class process_real_cpu_clock"><code class="computeroutput"><span class="identifier">process_real_cpu_clock</span></code></a> + </p> + </td> +<td> + <p> + GetProcessTimes + </p> + </td> +<td> + <p> + times + </p> + </td> +<td> + <p> + times + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.other_clocks.process_cpu_clocks_hpp.process_system_cpu_clock" title="Class process_system_cpu_clock"><code class="computeroutput"><span class="identifier">process_system_cpu_clock</span></code></a> + </p> + </td> +<td> + <p> + GetProcessTimes + </p> + </td> +<td> + <p> + times + </p> + </td> +<td> + <p> + times + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.other_clocks.process_cpu_clocks_hpp.process_user_cpu_clock" title="Class process_user_cpu_clock"><code class="computeroutput"><span class="identifier">process_user_cpu_clock</span></code></a> + </p> + </td> +<td> + <p> + GetProcessTimes + </p> + </td> +<td> + <p> + times + </p> + </td> +<td> + <p> + times + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.other_clocks.process_cpu_clocks_hpp.process_cpu_clock" title="Class process_cpu_clock"><code class="computeroutput"><span class="identifier">process_cpu_clock</span></code></a> + </p> + </td> +<td> + <p> + GetProcessTimes + </p> + </td> +<td> + <p> + times + </p> + </td> +<td> + <p> + times + </p> + </td> +</tr> +<tr> +<td> + <p> + <a class="link" href="reference.html#chrono.reference.other_clocks.thread_clock_hpp.thread_clock" title="Class thread_clock"><code class="computeroutput"><span class="identifier">thread_clock</span></code></a> + </p> + </td> +<td> + <p> + GetThreadTimes + </p> + </td> +<td> + <p> + clock_gettime(pthread_getcpuclockid) + </p> + </td> +<td> + <p> + clock_gettime(pthread_getcpuclockid) + </p> + </td> +</tr> +</tbody> +</table></div> +</div> +<br class="table-break"> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.faq"></a><a class="link" href="appendices.html#chrono.appendices.faq" title="Appendix: FAQ">Appendix: FAQ</a> +</h3></div></div></div> +<h5> +<a name="chrono.appendices.faq.h0"></a> + <span><a name="chrono.appendices.faq.why_does_process_cpu_clock_sometimes_give_more_cpu_seconds_than_real_seconds_"></a></span><a class="link" href="appendices.html#chrono.appendices.faq.why_does_process_cpu_clock_sometimes_give_more_cpu_seconds_than_real_seconds_">Why + does process_cpu_clock sometimes give more cpu seconds than real seconds?</a> + </h5> +<p> + Ask your operating system supplier. The results have been inspected with + a debugger, and both for Windows and Linux, that's what the OS appears to + be reporting at times. + </p> +<h5> +<a name="chrono.appendices.faq.h1"></a> + <span><a name="chrono.appendices.faq.are_integer_overflows_in_the_duration_arithmetic_detected_and_reported_"></a></span><a class="link" href="appendices.html#chrono.appendices.faq.are_integer_overflows_in_the_duration_arithmetic_detected_and_reported_">Are + integer overflows in the duration arithmetic detected and reported?</a> + </h5> +<p> + <span class="bold"><strong>Boost.Ratio</strong></span> avoids all kind of overflow + that could result of arithmetic operation and that can be simplified. The + typedefs durations don't detect overflow. You will need a duration representation + that handles overflow. + </p> +<h5> +<a name="chrono.appendices.faq.h2"></a> + <span><a name="chrono.appendices.faq.which_clocks_should_be_used_to_benchmarking_"></a></span><a class="link" href="appendices.html#chrono.appendices.faq.which_clocks_should_be_used_to_benchmarking_">Which + clocks should be used to benchmarking?</a> + </h5> +<p> + Each clock has his own features. It depends on what do you need to benchmark. + Most of the time, you could be interested in using a thread clock, but if + you need to measure code subject to synchronization a process clock would + be better. If you have a multi-process application, a system-wide clock could + be needed. + </p> +<h5> +<a name="chrono.appendices.faq.h3"></a> + <span><a name="chrono.appendices.faq.which_clocks_should_be_used_for_watching_"></a></span><a class="link" href="appendices.html#chrono.appendices.faq.which_clocks_should_be_used_for_watching_">Which + clocks should be used for watching?</a> + </h5> +<p> + For trace purposes, it is probably best to use a system-wide clock. + </p> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.acknowledgements"></a><a class="link" href="appendices.html#chrono.appendices.acknowledgements" title="Appendix: Acknowledgements">Appendix: Acknowledgements</a> +</h3></div></div></div> +<p> + The library's code was derived from Howard Hinnant's time2_demo prototype. + Many thanks to Howard for making his code available under the Boost license. + The original code was modified by Beman Dawes to conform to Boost conventions. + </p> +<p> + time2_demo contained this comment: + </p> +<p> + Much thanks to Andrei Alexandrescu, Walter Brown, Peter Dimov, Jeff Garland, + Terry Golubiewski, Daniel Krugler, Anthony Williams. + </p> +<p> + The file <boost/chrono_io.hpp> has been adapted from the experimental + header <code class="computeroutput"><span class="special"><</span><span class="identifier">chrono_io</span><span class="special">></span></code> from Howard Hinnant. Thanks for all Howard. + </p> +<p> + Howard Hinnant, who is the real author of the library, has provided valuable + feedback and suggestions during the development of the library. In particular, + The chrono_io_io.hpp source has been adapted from the experimental header + <code class="computeroutput"><span class="special"><</span><span class="identifier">chrono_io</span><span class="special">></span></code> from Howard Hinnant. + </p> +<p> + The acceptance review of Boost.Ratio took place between November 5th and + 15th 2010. Many thanks to Anthony Williams, the review manager, and to all + the reviewers: David Deakins, John Bytheway, Roland Bock and Paul A. Bristow. + </p> +<p> + Thanks to Ronald Bock, Andrew Chinoff, Paul A. Bristow and John Bytheway + for his help polishing the documentation. + </p> +<p> + Thanks to Tom Tan for reporting some compiler issues with MSVC V10 beta and + MinGW-gcc-4.4.0 and for the many pushing for an homogeneous <code class="computeroutput"><span class="identifier">process_cpu_clock</span></code> clock. + </p> +<p> + Thanks to Ronald Bock for reporting Valgind issues and for the many suggestions + he made concerning the documentation. + </p> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="chrono.appendices.todo"></a><a class="link" href="appendices.html#chrono.appendices.todo" title="Appendix: Future plans">Appendix: Future plans</a> +</h3></div></div></div> +<h5> +<a name="chrono.appendices.todo.h0"></a> + <span><a name="chrono.appendices.todo.for_later_releases"></a></span><a class="link" href="appendices.html#chrono.appendices.todo.for_later_releases">For + later releases</a> + </h5> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Enhance chrono I/O + <div class="itemizedlist"><ul class="itemizedlist" type="circle"> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5980" target="_top">#5980</a> + Take care of the Howard Hinnant <a href="http://home.roadrunner.com/~hinnant/bloomington/chrono_io.html" target="_top">proposal</a> + which has the advantage to provide I/O for system clocks using + the Gregorian Calendar. + </li> +<li class="listitem"> + <a href="http://svn.boost.org/trac/boost/ticket/5981" target="_top">#5981</a> + Added i/o state savers. + </li> +</ul></div> + </li> +<li class="listitem"> + Deprecate: + <div class="itemizedlist"><ul class="itemizedlist" type="circle"> +<li class="listitem"> + chrono I/O: The manipulators duration_short, duration long are + depreceated. You should use the parameterized form duration_fmt + instead. + </li> +<li class="listitem"> + chrono I/O: The duraction_punc<> facet observers is_short_name, + is_long_name are depreceated. You should use is_prefix and is_symbol + instead. + </li> +<li class="listitem"> + chrono I/O: The duraction_punc<> facet constructors taking + as argument the literals duraction_punc<>::use_long or use + short are depreceated. You should use duration_style::prefix and + duration_style::symbol instead. + </li> +<li class="listitem"> + chrono I/O: The duraction_punc<> facet constructors taking + the long names for seconds, minutes and hours and the associated + observers short_name, long_name and name are depreceated. Boost.Chrono + allows the user to use an interface that could be customized to + take care of locale issues. The default behavior been to return + the English words. + </li> +</ul></div> + </li> +</ul></div> +<p> + When BOOST_CHRONO_IO_V1_DONT_PROVIDE_DEPRECATED is defined the preceding + deprecated functions are not available. In addition, the user needs to define + the macro BOOST_CHRONO_IO_USES_EXTERNAL_LOCALIZATION to be able to customize + the locale interface. + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + Include Stopwatches. + </li> +<li class="listitem"> + Include chrono::date as defined by Howard Hinnant <a href="http://home.roadrunner.com/~hinnant/bloomington/date.html" target="_top">here</a>. + </li> +</ul></div> +</div> +</div> +<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> +<td align="left"></td> +<td align="right"><div class="copyright-footer">Copyright © 2008 Howard Hinnant<br>Copyright © 2006, 2008 Beman Dawes<br>Copyright © 2009-2011 Vicente J. Botet + Escriba<p> + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) + </p> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="reference.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../chrono.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../id319082-bb.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |